[tex]3ore=60*3=180 si 3 \frac{1}{2} =3ore+jumatate=\ \textgreater \ 3*60+30=180+30 \\ =210minute[/tex]
=180minute[tex] \\ 4,5ore=60*4+50 \\ =180+50 \\ =230minute[/tex][tex]1,25ore=60+25=85minute[/tex][tex] \\ 2 \frac{1}{2} =60*2+30=120+30 \\ =150minute[/tex][tex] \\ b)4min=4*60 \\ =\ \textgreater \ 240secunde \\ 6,5min=6*60+5 \\ =\ \textgreater \ 365secunde \\
50 \frac{1}{2} =50*60+30*60 \\ =\ \textgreater \ 4.800secunde \\
2,5ore=2*60*60+5*60 \\ =\ \textgreater \ 7.500secunde[/tex][tex] \\ c)360secunde=0ore,6min,0sec
\\ 360minute=6ore,0min,0sec \\
7.200secunde=2ore \\
5.400minute=90ore
\\ 216.000secunde=60ore[/tex]